China's voluntary product certification started in the late 1970s. After more than 20 years of development, it has accumulated rich experience and played an active role in improving product quality, guiding industry development, and protecting consumer interests. At present, the product certification bodies approved by the National Certification and Accreditation Administration have carried out voluntary product certifications such as product safety, electromagnetic compatibility, environmental ecology, resource conservation, sanitation, quality, etc. The product areas involved are electrical and electronic components and components. Medical equipment, toys, building materials, furniture, railway products, textiles and shoes, auto parts, beverages, chemical products, sporting goods, Chinese characters and software, gas appliances, etc. In agricultural products and food, product certification mainly includes: pollution-free agricultural product certification, organic food certification, green food certification and feed product certification.